<!DOCTYPE html>
<html>

<head>
    <meta charset="UTF-8">
    <title></title>
</head>

<body>
    <!--
			
			假设现在从后台接受了一段关于访客的信息数据(添加新的访客信息从info里面按照顺序拿取),请实现问题一.gif的效果.
			
		-->
    <button class="add">添加一条新的访客信息</button>
    <button class="del">删除选中</button>
    <button class="sort">从小到大</button>
    <button class="allSelect">全选功能</button>
    <input type="checkbox">
    <button class="reverse">反选</button>
    <table border="1" cellspacing="0" cellpadding="10">
        <tr>
            <th>序列号</th>
            <th>姓名</th>
            <th>年龄</th>
            <th>操作</th>
            <th>选择</th>
        </tr>
    </table>
    <script type="text/javascript">
        var info = [{
            name: "胡杭",
            age: 16
        }, {
            name: "胜明",
            age: 22
        }, {
            name: "军毅",
            age: 21
        }, {
            name: "晓华",
            age: 13
        }, {
            name: "盛聪",
            age: 23
        }, {
            name: "侦剑",
            age: 32
        }, {
            name: "红翔",
            age: 25
        }, {
            name: "超维",
            age: 18
        }, {
            name: "士琪",
            age: 22
        }, {
            name: "艳华",
            age: 20
        }];

        let addBtn = document.querySelector(".add");
        let delBtn = document.querySelector(".del");
        let sorBtn = document.querySelector(".sor");
        let allBtn = document.querySelector(".allSelect");
        let resBtn = document.querySelector(".reverse");
        let table = document.querySelector("table");
        let newTr = document.querySelector(".newTr");



        let count = "0";
        let arrInfo = [];
        info.map(function(item) {
            return arrInfo.push(item);
        });


        addBtn.addEventListener("click", function() { //点击添加
            let newTr = document.createElement("tr"); //创建节点
            table.appendChild(newTr); //添加
            newTr.classList.add("newTr"); //加类名

            for (let i = 0; i <= count; i++) {
                newTr.innerHTML = "<td></td> <td></td> <td></td> <td> </td> <td></td> ";
                newTr.children[0].innerText = count % 10 + 1;
                newTr.children[1].innerText = arrInfo[i % 10].name;
                newTr.children[2].innerText = arrInfo[i % 10].age;
                newTr.children[3].innerHTML = "<button> 删除 </button>";
                newTr.children[4].innerHTML = '<input type="checkbox">';
                // newTr.children[4].children[0].classList.add("all");
            }
            count++;
        });
    </script>


</body>

</html>